interface _CS_ {
    /**
     * 判断是否为大写
     * @param str 字符串
     * @returns true: 是大写; false: 不是大写;
     */
    isUpperCase(str: string): boolean;
}
{
    Object.defineProperty(_CS_.prototype, 'isUpperCase', {
        writable: false,
        configurable: false,
        enumerable: false,
        value: (str: string) => {
            return str === str.toUpperCase();
        }
    });
}
